Topic summary
molly-guard
Extracted from the Wikipedia article Kill switch.
Some kill switches feature a removable, protective barrier against accidental activation, such as a plastic cover that must be lifted or glass that must be broken, known as a molly-guard. Kill switches are features of mechanisms whose normal operation or foreseeable misuse might cause injury or death; industrial designers include kill switches because damage to or the destruction of the machinery is less important than preventing workplace injuries and deaths.